<template>
  <div class="xtx-carousel" @mouseenter="mouseEnter" @mouseleave="mouseLeave">
    <ul class="carousel-body">
      <li class="carousel-item" :class="{ fade: activeDefine === index }" v-for="(item, index) in list" :key="item.id">
        <RouterLink :to="item.hrefUrl">
          <img :src="item.imgUrl" alt="" />
        </RouterLink>
      </li>
    </ul>
    <a href="javascript:;" class="carousel-btn prev" @click="prev"><i class="iconfont icon-angle-left"></i></a>
    <a href="javascript:;" class="carousel-btn next" @click="next"><i class="iconfont icon-angle-right"></i></a>
    <!-- 小圆点 -->
    <div class="carousel-indicator">
      <span
        @mouseenter="activeDefine = index"
        :class="{ active: activeDefine === index }"
        v-for="(item, index) in list"
        :key="item.id"
      ></span>
    </div>
  </div>
</template>
<script lang="ts" setup name="lunbotu">
/*
vue3的方法,不使用TS,但是需要配合PropType
import { getCateList } from '@/types/homeTs/homeType'
import { PropType } from 'vue'
defineProps({
  list: {
    type: Array as PropType<getCateList[]>,
    required: true
    }
    })

    */

// ts方法
import { getCateList } from '@/types/homeTs/homeType'
import { onUnmounted, ref } from 'vue'
const prop = withDefaults(
  defineProps<{
    /**
     * @description 数据
     */
    list: getCateList[]
    /**
     * @description 自动播放
     */
    aotuoPlay?: boolean
    /**
     * @description 时间
     */
    time?: number
  }>(),
  { time: 1000, aotuoPlay: false }
)

// 1.默认激活第一张图片，默认激活第一个小圆点
const activeDefine = ref(0)
// 2.为左右箭头按钮绑定事件，activeIndex + -
// 上一张
const prev = () => {
  if (activeDefine.value <= 0) {
    activeDefine.value = prop.list.length
  }
  activeDefine.value--
}
// 下一张
const next = () => {
  activeDefine.value++
  if (activeDefine.value >= prop.list.length) {
    activeDefine.value = 0
  }
}

// 清理定时器
let timeOut: number = -1
//鼠标进入
const mouseEnter = () => {
  clearInterval(timeOut)
}
// 鼠标离开
const mouseLeave = () => {
  // 是否开启自动轮播
  if (prop.aotuoPlay) {
    mouseEnter()
    timeOut = window.setInterval(() => {
      next()
    }, prop.time)
  }
}
mouseLeave()

// 切换页面销毁
onUnmounted(() => {
  mouseLeave()
})
</script>
<style scoped lang="less">
.xtx-carousel {
  width: 100%;
  height: 100%;
  min-width: 300px;
  min-height: 150px;
  position: relative;
  .carousel {
    &-body {
      width: 100%;
      height: 100%;
    }
    &-item {
      width: 100%;
      height: 100%;
      position: absolute;
      left: 0;
      top: 0;
      opacity: 0;
      transition: opacity 0.5s linear;
      &.fade {
        opacity: 1;
        z-index: 1;
      }
      img {
        width: 100%;
        height: 100%;
      }
    }
    &-indicator {
      position: absolute;
      left: 0;
      bottom: 20px;
      z-index: 2;
      width: 100%;
      text-align: center;
      span {
        display: inline-block;
        width: 12px;
        height: 12px;
        background: rgba(0, 0, 0, 0.2);
        border-radius: 50%;
        cursor: pointer;
        ~ span {
          margin-left: 12px;
        }
        &.active {
          background: #fff;
        }
      }
    }
    &-btn {
      width: 44px;
      height: 44px;
      background: rgba(0, 0, 0, 0.2);
      color: #fff;
      border-radius: 50%;
      position: absolute;
      top: 228px;
      z-index: 2;
      text-align: center;
      line-height: 44px;
      opacity: 0;
      transition: all 0.5s;
      &.prev {
        left: 20px;
      }
      &.next {
        right: 20px;
      }
    }
  }
  &:hover {
    .carousel-btn {
      opacity: 1;
    }
  }
}
</style>
